524662 A7 B7 五、發明説明（彳） 發明之範疇： (請先閲讀背面之注意事項再填寫本頁) 本發明係有關一種用以切割樹木，如雜草、灌木或草 等的改良割草裝置。 生長在稻田之間小徑的野草每年需割除數次，因爲它 們會成爲害蟲的巢穴’由於割草需繁重人工，故都使用機 器行之。在此類機器中，肩掛式割草機因尺寸小及易於操 控而極普遍。在大部分肩掛式割草機中，通過一管狀操作 桿的驅動力傳動軸或驅動軸，係藉一設於操縱桿一端的引 擎來旋轉’以轉動設於操作桿另一端的刀片。在大部分情 形中’操作員利用一掛帶將割草機懸掛在其肩上，藉握持 設於操作桿一中間位置的U形把手，以擺動操作桿向前後 及左右的方向，即可藉旋轉的刀片割草。 近年來，對農場工作環境有進一步的改良需求。就肩 掛式割草機而言，也要求可有效的消除由引擎產生，經把 手傳遞至U形把手的振動，以減少操作員的負荷。 經濟部智慧財產局S工消費合作社印製 由於割草機通常用在沒有交流電電力源的農場等，故 其等一般係採用一小引擎來充當原動機或驅動源單位，而 該引擎並未設有平衡器以減少振動。在此小引擎中，當曲 柄軸受活塞的往復動作而旋轉所導致的振動力，其方向可 沿曲柄軸在3 6 0的角度範圍內改變。連接至驅動源單位 的驅動軸及操作桿將受旋轉之曲柄軸產生的振動影嚮，且 傳遞至驅動軸及操作桿的振動方向也可沿操作桿一軸向中 心線在3 6 0的角度範圍內改變。由驅動源單位傳遞至驅 動軸的振動包含兩主要成分：一爲由驅動源單位經驅動軸 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇χ297公釐） -4- 524662 A7 B7 五、發明説明（2) 傳遞至操作桿；而另一是由驅動源單位直接傳遞至操作桿 0 (請先閲讀背面之注意事項再填寫本頁) 設計以減少由驅動源單位經驅動軸傳遞至操作桿的振 動的割草機一範例經揭示於日本新型公開第2 -1 6 5 9 3號案。該割草機中，通過管狀操作桿的驅動軸 ’係藉一內燃機來旋轉，以轉動設於操作桿遠端的刀片。 驅動軸藉由一倂合在操作桿內的軸承總成，以可旋轉方式 支承於操作桿內。然而，此割草機在試圖減少由驅動源單 位經驅動軸傳遞至操作桿的振動時，面臨諸多限制。 經濟部智慧財產局8工消費合作社印製 另一方面，設計以減少由驅動源單位直接傳遞至操作 桿的振動的割草機一範例經揭示於日本新型公開第5 1 -6 4 7 3 2案。在此案的割草機中，設有一隔振構件，且 驅動源單位係藉一離合器殼體安裝在驅動軸通過的管狀操 作桿一端。離合器殻體內安裝有一在驅動源單位出力軸及 驅動軸之間作動的離合器。在此割草機中，一連接管固接 在操作桿一端且伸延向引擎，且一隔振構件設於連接管相 對表面及離合器殼體之間。因此，驅動源單位是藉隔振構 件經操作桿支承，使得由驅動源單位傳遞至操作桿的振動 可藉隔振構件減弱。然而，此割草機在試圖減少由驅動源 單位傳遞至操作桿的振動時，也面臨諸多限制；即雖然設 有隔振構件，割草機無法有效的防止振動由驅動源單位傳 遞至操作桿。 然而，操作人員一直期望能將操作桿的振動減至最小 ，以減少操作員的負荷。爲了該目的，需有一些配置以防 本紙張尺度適用中國國家標準（CNS ) A4^格（210X297公釐） ~ "" -5- 524662 Α7 Β7 五、發明説明（3) (請先閲讀背面之注意事項再填寫本頁) 止操作桿與來自驅動源單位的振動產生共振，且操作桿本 身仍有改良空間。但是’來自驅動源單位的振動其頻率會 大幅變化，故難以處理所有的振動頻率。 爲了防止操作桿的共振，已知可將操作桿的固有振動 頻率，設定成比所有可能來自驅動源單位的振動的頻率爲 大。然而，由於割草機操作桿是一其內貫穿有一驅動軸的 細長構件，操作桿需爲一輕質且價廉的構件，同時需保有 所需機械強度，如扭力及彎曲強度及縱向彈性模數等，以 達成所需的功能。 綜上所述，本發明一目的爲提供一種可有效防止操作 桿與自驅動源單位傳遞至操作桿的振動產生共振的割草機 ，且減少操作桿重量及製造成本，而同時保有操作桿所需 機械強度者。 經濟部智慧財產局員工消費合作社印製 依據本發明一型態，割草機包含一操作桿，具有一外 管部、一通過外管部的內管部、及三只將外管部及內管部 相互聯接的脊部，一驅動軸，穿過內管部，且藉一軸襯可 旋轉的支承在內管部內，設於操作桿一端的驅動源單元以 旋轉驅動軸，及設於操作桿另一端的刀片，可藉驅動源單 元的驅動軸轉動之。三只脊，包括第一、第二、及第三脊 部’係以不相等的角度間距配置，使得第一及第二脊部形 成的角度Θ 1 ，第二及第三脊部形成的角度β 2，及第三 及第一脊部形成的角度Θ 3相互不同。且內管部及外管部 係形成一體。 本發明的特徵爲三只將外管部及內管部相互聯接的脊 本紙張尺度適用中周國家標準（CNs ) Α4規格（210 X 297公釐） -6- 524662 A7 ______B7_524662 A7 B7 5. Description of the invention (彳) The scope of the invention: (Please read the notes on the back before filling out this page) The present invention relates to an improved mowing device for cutting trees, such as weeds, shrubs or grass . The weeds that grow in the paths between the paddy fields need to be cut several times a year, because they will become the nests of pests. Because weeding requires heavy labor, we use machines. In such machines, shoulder-mounted mowers are very common due to their small size and ease of handling. In most shoulder-mounted lawn mowers, the driving force transmission shaft or drive shaft of a tubular operating lever is rotated 'by an engine provided at one end of the operating lever to rotate the blade provided at the other end of the operating lever. In most cases, the 'operator' uses a strap to hang the lawn mower on its shoulder. By holding the U-shaped handle located at the middle position of the operating lever, the operator can swing the operating lever forward, backward, and left and right. Mowing the grass with a rotating blade. In recent years, there has been a demand for further improvement of the farm working environment. As for the shoulder-mounted lawn mower, it is also required to effectively eliminate the vibration generated by the engine and transmitted to the U-shaped handle through the handle to reduce the operator's load. Printed by S Industry Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Because lawn mowers are usually used on farms without AC power sources, they generally use a small engine as the prime mover or drive source unit, and the engine is not provided. Balancer to reduce vibration. In this small engine, when the crankshaft is rotated by the reciprocating action of the piston, the direction of the vibration force can be changed along the crankshaft within an angle of 360 °. The driving shaft and operating lever connected to the driving source unit will reflect the vibration generated by the rotating crank shaft, and the direction of vibration transmitted to the driving shaft and operating lever can also be along the axial centerline of the operating lever at an angle of 3 6 0 Change within range. The vibration transmitted from the drive source unit to the drive shaft includes two main components: one is that the drive source unit passes the drive shaft, and the paper size applies the Chinese National Standard (CNS) A4 specification (21 × 297 mm) -4- 524662 A7 B7 5 2. Description of the invention (2) Transmission to the operating lever; the other is directly transmitted to the operating lever 0 by the drive source unit (please read the precautions on the back before filling this page) Designed to reduce the transmission from the drive source unit to the operation shaft An example of a lawn mower with a vibration of an operating lever is disclosed in Japanese New Publication No. 2-1 6 5 9 3. In this lawnmower, the drive shaft of the tubular operating lever is rotated by an internal combustion engine to rotate a blade provided at the distal end of the operating lever. The drive shaft is rotatably supported in the operating rod by a bearing assembly which is integrated in the operating rod. However, this lawn mower faces many limitations when trying to reduce the vibration transmitted from the drive source unit to the operating lever via the drive shaft. Printed by the Ministry of Economic Affairs, Intellectual Property Bureau, 8th Industrial Cooperative Cooperative. On the other hand, an example of a lawn mower designed to reduce the vibration transmitted directly from the drive source unit to the operating lever is disclosed in Japanese New Publication No. 5 1 -6 4 7 3 2 case. In the lawn mower of this case, a vibration isolating member is provided, and the driving source unit is mounted on one end of the tubular operating lever through which the driving shaft passes through a clutch housing. A clutch is installed in the clutch housing to operate between the output shaft of the drive source unit and the drive shaft. In this lawn mower, a connecting pipe is fixedly connected to one end of the operating lever and extends toward the engine, and a vibration isolating member is provided between the opposite surface of the connecting pipe and the clutch housing. Therefore, the drive source unit is supported by the operating lever through the vibration isolating member, so that the vibration transmitted from the driving source unit to the operating lever can be reduced by the vibration isolating member. However, this lawn mower also faces many limitations when trying to reduce the vibration transmitted from the drive source unit to the operating lever; that is, although it is provided with a vibration isolation member, the lawn mower cannot effectively prevent the vibration from being transmitted from the drive source unit to the operating lever. . However, operators have been expecting to minimize the vibration of the joystick to reduce the load on the operator. For this purpose, some configurations are needed to prevent the paper size from applying the Chinese National Standard (CNS) A4 ^ (210X297 mm) ~ " " -5- 524662 Α7 Β7 V. Description of the invention (3) (Please read first Note on the back, please fill out this page again) to prevent the joystick from resonating with the vibration from the drive source unit, and the joystick itself still has room for improvement. However, the frequency of the vibration from the driving source unit varies greatly, and it is difficult to handle all vibration frequencies. In order to prevent resonance of the joystick, it is known that the natural vibration frequency of the joystick can be set to be higher than the frequency of all vibrations that may come from the drive source unit. However, because the mower operating lever is an elongated member with a drive shaft running through it, the operating lever needs to be a lightweight and inexpensive member while maintaining the required mechanical strength, such as torsional and bending strength and longitudinal elastic modulus. Count to achieve the desired function. In summary, an object of the present invention is to provide a lawn mower that can effectively prevent resonance between the operating lever and the vibration transmitted from the driving source unit to the operating lever, and reduce the weight and manufacturing cost of the operating lever, while maintaining the operating lever. Those who need mechanical strength. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs according to a form of the present invention, the lawn mower includes an operating lever, an outer tube section, an inner tube section passing through the outer tube section, and three outer tube sections and inner sections. A ridge portion of the tube portion interconnected, a driving shaft passing through the inner tube portion, and rotatably supported in the inner tube portion by a bushing, a driving source unit provided at one end of the operating lever to rotate the driving shaft, and provided on the operating lever The blade at the other end can be rotated by the drive shaft of the drive source unit. The three ridges, including the first, second, and third ridges, are arranged at unequal angular intervals, so that the angle formed by the first and second ridges Θ 1 and the angle formed by the second and third ridges β 2 and the angle θ 3 formed by the third and first ridges are different from each other. And the inner pipe part and the outer pipe part are integrated. The invention is characterized by three ridges connecting the outer tube portion and the inner tube portion to each other. The paper size is applicable to the National Standards (CNs) A4 (210 X 297 mm) -6- 524662 A7 ______B7_
五、發明説明（J (請先閲讀背面之注意事項再填寫本頁) 部係以不相等的角度間距沿操作桿的軸向中心線配置，使 得形成於該等脊部之間的角度θ 1、Θ 2，及Θ 3相互不 同。因此，操作桿的該等脊部沿該軸向中心線呈現一不相 對稱的剖面。因此，如此構形的操作桿的幾何慣性矩沿該 軸向中心線的所有角度位置均爲不同値，因此，操作桿的 固有振動頻率在所有角度位置也爲不同値。 由驅動源單元傳遞至操作桿的振動可沿操作桿的軸向 中心線在3 6 0 °的方向範圍內變更。當在一特定振動方 向、且由驅動源單元傳遞的振動之振動頻率與操作桿的固 有振動頻率相符合時，此振動頻率的一致只是暫時性或過 渡性事件。即操作桿的固有振動頻率只在其中一角度位置 才與由驅動源單元傳遞的振動頻率相符合，使得操作桿的 共振可簡易的被防止。 經濟部智慧財產局員工消費合作社印製 由於操作桿係一體成形的雙管結構，其中內管部及外 管部係藉以不相等的角度間距相互間隔開的脊部相互聯接 ’操作桿可製成具有簡單剖面輪廓的單件式構件，而同時 其卻可呈現強大的機械強度。因此，本發明可減少操作桿 的製造成本及整體重量，而同時保有所需的機械強度。 在一較佳實例中，由第一脊部及第二脊部形成的角度 0 1設定爲大於6 0 ° 、但小於1 2 0 ° 。如角度0 1設定 爲小於120°的大角度，三個角度0 1、02、及Θ3 可相互變得極靠近，此可達成較佳平衡度的幾何慣性矩， 且在操作桿的任何角度位置保持相當大數値的幾何慣性矩 〇 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） " 524662 A 7 B7_ 五、發明説明（Θ 圖式之槪述： (請先閲讀背面之注意事項再填寫本頁) 本發明之詳盡細節、優點及特色將在參照下文圖式及 §兌明而有進一步之認知。 圖1係依據本發明之一具體實施例之割草機之側視圖 〇 圖2係顯不圖1之割草機如何割草之槪意圖。 圖3係圖1割草機之放大剖面圖。 圖4係割草機之放大剖面圖，特別顯示操作桿如何與 圖3的離合器殼相聯結。 圖5係圖4之離合器殼之透視圖。 圖6係沿圖5之6 — 6線截取之剖視圖。 圖7係沿圖4之7 — 7線截取之操作桿剖視圖。 圖8係沿圖4之8 — 8線截取之剖視圖，特別顯示操 作桿如何與操作桿安裝部相聯結。 圖9與圖4相對應，顯示操作桿及離合器殼在非聯結 的狀態。 經濟部智慧財產局員工消費合作社印製 圖1 0顯示操作桿相對於由第一及第二徑向脊部形成 的一角度所呈現的幾何慣性矩特性。 主要元件對照表 1〇：割草機 1 1〈操作桿 1 1 a :操作桿的一端部 本紙張尺度適用中國國家標準（CNS ) A4規格(21〇Χ297公釐） ~^ -8- 524662 A7 B7V. Description of the invention (J (please read the precautions on the back before filling this page) The parts are arranged along the axial centerline of the operating lever at unequal angular intervals so that the angle θ formed between the ridges , Θ 2, and Θ 3 are different from each other. Therefore, the ridges of the operating lever present an asymmetrical cross section along the axial centerline. Therefore, the geometric moment of inertia of the operating lever thus configured is along the axial center. All angular positions of the line are different, so the natural vibration frequency of the operating lever is also different at all angular positions. The vibration transmitted from the drive source unit to the operating lever can be along the axial centerline of the operating lever at 3 6 0 Change in the direction range of °. When a specific vibration direction and the vibration frequency of the vibration transmitted by the driving source unit matches the natural vibration frequency of the operating lever, the consistency of this vibration frequency is only a temporary or transient event. That is, The natural vibration frequency of the joystick only matches the vibration frequency transmitted by the drive source unit at one of the angular positions, so that the resonance of the joystick can be easily prevented. The production bureau employee consumer cooperative prints a double-tube structure integrally formed by the operating rod system, in which the inner tube portion and the outer tube portion are interconnected by ridges that are spaced apart from each other at unequal angular intervals. The operating rod can be made into a simple cross section Contoured one-piece member, but at the same time it can show strong mechanical strength. Therefore, the present invention can reduce the manufacturing cost and overall weight of the operating lever, while maintaining the required mechanical strength. In a preferred example, by The angle 0 1 formed by the first ridge portion and the second ridge portion is set to be greater than 60 °, but smaller than 120 °. For example, if the angle 01 is set to a large angle smaller than 120 °, the three angles 0 1, 02, and Θ3 can become very close to each other, which can achieve a better balance of geometric moment of inertia, and maintain a considerable number of geometric moments of inertia at any angular position of the joystick. 0 This paper size applies Chinese National Standard (CNS) A4 specifications (210X297 mm) " 524662 A 7 B7_ V. Description of the invention (The description of the Θ diagram: (Please read the notes on the back before filling this page) The detailed details, advantages and features of the present invention will be described in Further understanding according to the following drawings and §. Figure 1 is a side view of a lawnmower according to a specific embodiment of the present invention. Figure 2 is a schematic view showing how the lawnmower of Figure 1 cuts grass. Fig. 3 is an enlarged sectional view of the lawnmower of Fig. 1. Fig. 4 is an enlarged sectional view of the lawnmower, specifically showing how the operating lever is connected to the clutch housing of Fig. 3. Fig. 5 is a perspective view of the clutch housing of Fig. 4. Fig. 6 is a sectional view taken along line 6-6 of Fig. 5. Fig. 7 is a sectional view of the operating lever taken along line 7-7 of Fig. 4. Fig. 8 is a sectional view taken along line 8-8 of Fig. 4, especially shown. How the operating lever is connected to the operating lever mounting part. Figure 9 corresponds to Figure 4 and shows the operating lever and clutch housing in a non-coupled state. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Geometric moment of inertia exhibited by an angle formed by the first and second radial ridges. Comparison table of main components 10: Lawn mower 1 1 <Operating lever 1 1 a: One end of the operating lever This paper size applies Chinese National Standard (CNS) A4 specification (21〇 × 297 mm) ~ ^ -8- 524662 A7 B7
五、發明説明（S 1 1 b :操作桿的一端部的端面 1 1 c :操作桿另一端 (請先閱讀背面之注意事項再填寫本頁) 1 1 d :貫穿孔 1 2 :驅動軸 13:驅動源單元 1 3 a :驅動源單元的輸出軸 1 3 b :驅動源單元的殼 1 4 :刀片 1 5 :把手 1 6 :把手架 1 7 :左柄 1 8 :右柄 1 9 :掛帶 2 1 :主軸部 2 2 :驅動側端軸部 2 6 :刀具側端軸部 經濟部智慧財產局員工消費合作社印製 3 0 :離合器機構 31:離合器鼓輪 3 2 :旋轉構件 3 3 :離合器構件 3 4 :輪轂 3 5 :軸承 3 6 :鎖定環 4 0 :離合器殼 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -9- 524662 A7 B7 五、發明説明（) 41:操作桿安裝部 4 1 a :圓柱體 (請先閲讀背面之注意事項再填寫本頁) 4 1 b :狹縫 4 1 c :凸緣 41d:貫穿孔 4 2 :聯結部 4 2 a :圓柱形壁 4 2 b :周邊狹縫 4 2 c :貫穿孔 4 3 :驅動源安裝部 4 3 a :外圓柱體部 4 3 b :內圓柱體部 4 3 c :鬆驰配合孔 4 3 d :鄰接區 51:插入螺帽 5 2 :螺釘 5 3 :螺栓 經濟部智慧財產局員工消費合作社印製 61:變速機構殼 6 2 :變速機構 6 3 :驅動斜齒輪 6 4 :被動斜齒輪 6 5 :被動軸 6 6 :軸承 6 7 :軸承 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -10- 524662 A7 B7 五、發明説明（g (請先閱讀背面之注意事項再填寫本頁) 71:外管部 7 2 :內管部 7 3，7 4，7 5 :脊 7 6 :軸襯 發明之詳盡說明： 圖1及2顯示本發明一實例的割草機1 〇 ’適於切割 樹木，如雜草、灌木或草等。割草機1 0具有一管狀操作 桿1 1、縱向通過管狀操作桿1 1的驅動力傳動軸或驅動 軸1 2、設於操作桿1 1 一端的原動機或驅動源單元1 3 、例如引擎或電動馬達、及設於操作桿1 1另一端的刀片 1 4。驅動軸1 2可藉驅動源單元1 3轉動，使得刀片 1 4可藉驅動源單元1 3以驅動軸1 2轉動之。割草機 1 〇也具有一 U形把手1 5，設於操作桿1 1 一縱向中間 部分。把手1 5係藉一把手架1 6固定至操作桿1 1 ，且 具有左及右柄1 7及1 8。把手1 5的右柄1 8充當具有 節流桿及鎖定桿的操作部，以控制驅動源單元1 3。 經濟部智慧財產局員工消費合作社印製 如圖2，操作員Μ利用一以其相對端固繫至操作桿 1 1中間部分的掛帶1 9 ，將割草機1 0懸掛在其肩上。 操作員Μ藉驅動源單元1 3旋轉刀片1 4，同時藉柄1 7 及1 8擺動刀片1 4向前後及左右的方向，即可割草。 圖3係圖1割草機1 〇之剖面圖，顯示容裝在離合器 殼4 0內，且設於驅動軸1 2及驅動源單元1 3的一輸出 軸1 3 a之間的離合器機構3 0。即驅動源單元1 3是經 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -11 - 524662 A7 B7 五、發明説明（Θ 離合器殼4 0安裝至操作桿1 1的一端。在割草機1 〇中 ，操作桿1 1及驅動軸1 2是與驅動源單元1 3的輸出軸 (請先閲讀背面之注意事項再填寫本頁) 1 3 a同軸向的定位。 驅動軸1 2是「不同金屬相結合的軸」，由不同種類 的金屬組合而成。具體言之，驅動軸1 2具有一由鈦合金 製成的管狀主軸部2 1、藉例如銅焊固定至管狀主軸部 2 1 —端的驅動側端軸部2 2、及藉例如銅焊固定至管狀 主軸部2 1另一端的刀具側端軸部2 6。驅動側端軸部 2 2及刀具側端軸部2 6兩者均由鋼製成。鈦合金槪與鋼 具有相同的機械強度（扭力強度、彎曲強度、縱向彈性模 量等）。因此，該鈦合金製成的主軸部2 1可充分的保持 割草機驅動軸所需的扭力及彎曲剛性，即便是主軸部2 1 具有與習知對應物相同的直徑。 經濟部智慧財產局員工消費合作社印製 此外，鋼的比重約爲7 . 8，而鈦合金的比重約爲 4 . 5 ;即鈦合金的比重比鋼的比重小許多。因此，本實 例採用的鈦合金製主軸部2 1可使因主軸部2 1本身重量 所導致的垂度振動（sagging vibration )減至最小。因此， 可藉簡單結構，在當驅動源單元1 3啓動時，將操作桿 1 1藉由驅動軸1 2傳遞至把手1 5的振動減至最小。因 此，可顯著減少操作員的負荷。此外，由於鋼製驅動側端 軸部2 2及刀具側端軸部2 6係一體的連接至鈦合金製主 軸部2 1的相對端，故可保有在驅動軸1 2中，端軸部 2 2及2 6聯接至主軸部2 1所在的部分內的耐久性。 離合器機構3 0係一離心式離合器，具有一以鍵槽與 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -12- 524662 A7 B7 五、發明説明（）〇 (請先閲讀背面之注意事項再填寫本頁) 驅動軸1 2之驅動側端軸部2 2聯接的離合器鼓輪3 1、 一聯接至驅動源單元1 3的輸出軸1 3 a的旋轉構件3 2 '及一僅在旋轉構件3 2高速旋轉時始將旋轉構件3 2與 離合器鼓輪3 1相嚙合的離合器構件3 3。離合器鼓輪 3 1是一圍繞旋轉構件3 2的杯狀構件。 離合器殼4 0係由一樹脂材料製成的一體模製構件， 具有一與操作桿1 1 一端部1 1 a相連結的操作桿安裝部 4 1、一具有特定撓性且由操作桿安裝部4 1朝向驅動源 單元1 3伸延的撓性聯結部4 2、及一由撓性聯結部4 2 伸向驅動源單元1 3且與驅動源單元1 3相聯結的驅動源 安裝部4 3。離合器殼4 0最好是由其內混合有玻璃纖維 的尼龍樹脂製成。 操作桿安裝部4 1及驅動源安裝部4 3的剛性比撓性 聯結部4 2的剛性大，以便可靠的支承操作桿1 1及驅動 源單兀1 3。撓性聯結部4 2具有較小的剛性，使得可有 效的對驅動源單兀1 3減振。驅動源安裝部4 3係螺接至 驅動源單元1 3的殼1 3 b。 經濟部智慧財產局員工消費合作社印製 由於離合器殼4 0是一體模製的單件構件以提供操作 桿安裝部4 1、撓性聯結部4 2、及驅動源安裝部4 3， 故可減少割草機的構件數量，而簡化割草機結構。 刀片1 4係經一變速機構殼6 1可旋轉的聯接至操作 桿1 1另一端1 1 c。變速機構殻6 1內容置有一設於驅 動軸1 2及刀片1 4之間的變速機構6 2。變速機構6 2 具有一連接至刀具側端軸部2 6的驅動斜齒輪6 3、一與 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -13- 524662 A7 B7 五、發明説明（^ 驅動斜齒輪6 3相嚙合的被動斜齒輪6 4、及一其上安裝 有被動斜齒輪6 4及刀片1 4的被動軸6 5。 驅動軸1 2係沿其縱向方向、相互間隔開、可旋轉的 支承在其多數位置。 首先，藉一輪轂3 4及多數軸承3 5以驅動源安裝部 4 3來可旋轉的支承驅動軸1 2的一端部。即驅動軸1 2 的驅動側端軸部2 2以鍵槽與離合器鼓輪3 1之輪轂3 4 相連結，而輪轂3 4係藉複數軸承3 5支承。 其次，藉驅動斜齒輪6 3及多數軸承6 6以變速機構 殼6 1來可旋轉的支承驅動軸1 2的另一端部。即驅動軸 1 2的刀具側端軸部2 6與驅動斜齒輪6 3相連結，而驅 動斜齒輪6 3係藉複數軸承6 6支承。 第三，介於驅動側端軸部2 2及刀具側端軸部2 6之 間的驅動軸1 2 —中間部分，係藉複數軸襯7 6以操作桿 1 1可旋轉的支承之；該等軸襯7 6係設於驅動軸1 2上 ，且沿其縱方向以均勻間距相互隔開。圖3的標號6 7代 表用以支承被動軸6 5的軸承。 圖4至8顯示操作桿1 1如何與離合器殼4 0相聯結 〇 見圖4，操作桿安裝部4 1及撓性聯結部4 2共同構 成一圓柱體，管狀操作桿1 1的一端部1 1 a插入該圓柱 體中。驅動源安裝部4 3具有一沿朝向離合器機構3 0方 向漸增其直徑的推拔狀外圓柱體部4 3 a ，及與該推拔狀 外圓柱體部4 3 a成同心圓關係一體形成的內圓柱體部 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ---------衣-- (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -14- 524662 A7 B7 五、發明説明（ (請先閲讀背面之注意事項再填寫本頁) 4 3 b。內圓柱體部4 3 b具有一軸向鬆驰配合孔4 3 c ’及一深入該孔4 3 c的鄰接區4 3 d。該驅動源安裝部 4 3也具有軸承3 5。 鬆驰配合孔4 3 c是以鬆驰套合方式接納經操作桿安 裝部4 1插入離合器殼4 0內的操作桿1 1該一端部 1 1 a，使得該一端部1 1 a可在該軸向方向滑移。孑匕 4 3 c朝向鄰接區4 3 d漸尖細。操作桿1 1的一端部 1 1 a可以其端面1 1 b鄰接深入內圓柱體部4 3 b的孔 4 3 c內的鄰接區4 3 d。標號3 6表示鎖定環3 6。操 作桿安裝部4 1具有一形成於其圓柱狀本體4 1 a (圖5 )內的軸向狹縫4 1 b。操作桿安裝部4 1的細節將在圖 8中敘述。 經濟部智慧財產局員工消費合作社印製 見圖5，離合器殼4 0的撓性聯結部4 2具有多數排 的周邊狹縫4 2 b，相互以特定軸向間距隔開。各周邊狹 縫4 2 b係一與撓性聯結部4 2的一軸向貫穿孔4 2 c相 連通的貫穿孔，且沿撓性聯結部4 2的一圓柱形壁4 2 a 圓周方向呈細長狀；各周邊狹縫4 2 b僅沿圓柱形壁 4 2 a的一部份圓周伸延。該等狹縫4 2 b沿圓柱形壁 4 2 a的軸向方向交錯開配置。因此，當橫向貫穿存在有 兩周邊狹縫4 2 b的一區域切割開聯結部4 2時，在聯結 部4 2的一假想剖面內，該兩周邊狹縫4 2 b係沿圓柱形 壁4 2 a的軸向中心線相互對稱。此等周邊狹縫4 2 b使 撓性聯結部具有所需的撓性。 圖6係沿圖5之6 — 6線截取之剖視圖，顯示驅動源 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -15- 524662 A7 _ B7 五、發明説明（ (請先閲讀背面之注意事項再填寫本頁) 女裝部4 3的一周圍面積，在此面積內，一插入螺帽5 1 埋入以朝向安裝部4 3的內部，且一螺釘5 2貫穿插入螺 帽5 1。操作桿1 1包括一內管部7 2，及具有一軸向貫 穿孔1 1 d的外管部7 1。貫穿插入螺帽5 1進入操作桿 1 1軸向貫穿孔1 1 d的螺釘5 2可防止操作桿1 1意外 的與驅動源安裝部4 3脫離。該螺釘5 2可以其他具有類 似功能的螺栓、鉚釘等來代替。 經濟部智慧財產局員工消費合作社印製 圖7係沿圖4之7 — 7線截取之操作桿剖視圖。在操 作桿1 1中，內管部7 2穿過外管部7 1的內部，而內管 部72及外管部71藉三只徑向脊73、74、75相互 聯接。內管部7 2、外管部7 1、及徑向脊7 3、7 4、 7 5係一體形成。即操作桿1 1槪爲一雙管結構構形，具 有一圓形剖面，且藉徑向脊7 3、7 4、7 5相互聯接的 內管部7 2及外管部7 1相互成同心關係。該三只脊7 3 、74、75在下文中將分別簡稱爲第一脊73、第二脊 7 4、及第三脊75。在操作桿1 1中，由第一脊73及 第二脊7 4形成的角度θ 1設定爲大於6 0 ° 、但小於 120° (60° 〈01 〈120° 〉，由第二脊74及第 三脊7 5形成的角度Θ 2設定爲12 0° ，而由第三脊 7 5及第一脊7 3形成的角度0 3設定爲剩餘的角度（即 360° —（0 1 + 02) •，需指出者，角度0 1不等於 角度<92，也不等於角度03。 易言之，三只脊73、74、7 5係以不相等的角度 間距（0 1 Θ 2及θ 1 Θ 3 )沿操作桿1 1的軸向中 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -16- 524662 A7 B7 五、發明説明（ 心配置。簡言之，三只脊7 3、7 4、7 5係以不相對稱 方式，沿操作桿1 1的軸向中心線P 1配置。因此，三只 脊7 3、7 4、7 5在操作桿1 1內，沿軸向中心線p 1 具有不相對稱的剖面輪廓。 圖8係沿圖4之8 — 8線截取之操縱桿剖視圖，特別 顯示操作桿1 1如何與操作桿安裝部4 1相聯結。如圖所 示，驅動軸1 2穿過操作桿1 1的內管部7 2 ，且藉一軸 襯7 6支承；該軸襯7 6是套置於內管部7 2內的圓柱形 滑動軸承。 操作桿安裝部4 1槪以圓柱體4 1 a構形，具有一狹 縫4 1 b及一對相向、且其間置有該狹縫4 1 b的凸緣 4 1 c。操作桿1 1的外管部7 1套入圓柱體4 1 a的一 軸向貫穿孔4 1 d內，而相向的凸緣4 1 ^藉一螺栓5 3 固持在一起，使得外管部7 1的一端部乃摩擦性的固定至 操作桿安裝部4 1的內表面。 圖9與圖4相對應，顯示操作桿1 1及離合器殼4 〇 在非聯結的狀態。如圖所示，操作桿安裝部4 1的軸向貫 穿孔4 1 d、撓性聯結部4 2的軸向貫穿孔4 2 c、及驅 動源安裝部4 3的軸向鬆驰配合孔4 3 c —齊構成一軸向 連續孔，朝向鄰接區4 3 d漸尖細。 當操作桿1 1的一端部1 1 a沿圖9箭頭所示方向， 經軸向貫穿孔4 1 d插入，通過軸向貫穿孔4 2 c、進入 鬆驰配合孔4 3 c時，操作桿1 1的端面1 Ί b鄰接鄰接 區4 3 d。此鄰接區4 3 d是一階梯狀端面，形成於驅動 本紙張尺度適用中國國家標準（CNS ) A4規格（2i〇x297公羡） ---------衣-- (請先閱讀背面之注意事項再填寫本頁) 訂 麵 經濟部智慧財產局員工消費合作社印製 -17- 524662 A7 B7 五、發明説明（ (請先閱讀背面之注意事項再填寫本頁) 源安裝部4 3之鬆弛配合孔43(：的深入內部。端面 1 1 b乃一垂直於操作桿1 1軸線的平坦面。軸向鬆驰配 合孔4 3 c朝向驅動源單元1 3漸尖細’且其連鄰接區 4 3 d的最深入部分的直徑比操作桿1 1外管部7 1的外 徑稍大。 在本實例中，離合器殼4 0的特點功能是支承驅動源 單元1 3的功能，及減小由驅動源單元1 3傳遞至操作桿 1 1的振動的功能係相互獨立執行的。即離合器殻4 ◦可 分別執行驅動源支承功能及隔振功能。 具體言之，驅動源安裝部4 3可沿一軸向方向支承， 其中操作桿1 1的端面1 1 b鄰接驅動源安裝部4 3的鄰 接區4 3 d。因此，驅動源單元1 3可藉驅動源安裝部 4 3以操作桿1 1的端面1 1 b來支承。驅動源安裝部 4 3可靠的被防止由操作桿1 1意外的脫離，因其藉撓性 聯結部4 2及操作桿安裝部4 1連結至操作桿1 1。 經濟部智慧財產局員工消費合作社印製 此外，由於鬆驰配合孔4 3 c的直徑適於容納操作桿 1 1 一端部1 1 a以作軸向滑移動作，故在操作桿1 1外 周面及界定該鬆驰配合孔4 3 c的驅動源安裝部4 3內壁 面之間形成有一小間隙。此小間隙允許驅動源單元1 3沿 操作桿1 1的一端部1 1 a作某種程度的振動；即該小間 隙執行隔振功能。由於驅動源單元1 3係藉操作桿1 1的 端面1 1 b軸向支承，故撓性聯結部4 2不需支承單元 1 3，使得撓性聯結部4 2可完全與驅動源單元支承功能 相獨立的執行其減振功能。 本紙張尺度適中國國家標準（CNS ) A4規格（210X297公釐1 " -18 - 524662 A7 B7 五、發明説明（ (請先閲讀背面之注意事項再填寫本頁) 藉上述配置，本實例可顯著的減弱由驅動源單元1 3 傳遞至操作桿1 1的不良振動，同時允許操作桿1 1可靠 的支承該驅動源單元1 3。 圖1 0顯示操作桿相對於由第一及第二脊部形成的角 度0 1所呈現的幾何慣性矩特性。水平軸線代表操作桿 1 1之第一及第二脊部7 3及74之間的角度θ 1 ，而垂 直軸線顯示操作桿1 1的幾何慣性矩I 。幾何慣性矩在此 係採用一中立軸線N L爲基礎。此外，此圖顯示在操作桿 的幾何慣性矩，在第二及第三脊部7 4及7 5之間的角度 Θ 2固定在1 2 0°時，嚮應在第一及第二脊部7 3及 7 4之間的角度β 1的變化而產生的變化。 具體言之，圖1 0的（a )部分顯示當角度0 1是 1 2 0 °時，操作桿的幾何慣性矩I 。此範例假設操作桿 的幾何慣性矩I是” 100” 。 圖1 0的（b )部分顯示當角度0 1是6 0 °時，操 作桿的幾何慣性矩I。此範例中，操作桿的幾何慣性矩I 約是” 95” ，相較於（a )部分的” 100” 。 經濟部智慧財產局員工消費合作社印製 圖1 0的（c )部分顯示當角度θ 1是1 8 0 °時， 操作桿的幾何慣性矩I。此範例中，操作桿的幾何慣性矩 I約是” 9 5 ” ，如同圖1 0的（b )部分。 如圖1 0所示，操作桿1 1的幾何慣性矩I呈現一獨 特的曲線，在圖1 0的（a )部分表示的角度條件下得其 極大値，而當角度條件靠近圖1 0的（b )或（c )部分 時，則逐漸減小其値。下文將敘述，在考慮及此幾何慣性 本紙張尺度適用中國國家標準（CNS ) A4規格（210 X 297公釐） -19- 524662 A7 ____B7_ 五、發明説明（七 (請先閱讀背面之注意事項再填寫本頁) 矩特性下，爲何三只脊部7 3、7 4、7 5係以不相等的 角度間距，或相互以不相對稱關係沿操作桿i 1的軸向中 心線P 1配置。 由於脊部7 3至7 5在操作桿1 1內的不相對稱剖面 輪廓，故操作桿1 1的幾何慣性矩I在沿該軸向中心線 P 1的所有角度位置均爲不同値。因此，操作桿的固有振 動頻率在沿該軸向中心線p 1的所有角度位置也爲不同値 〇 此外，由驅動源單元1 3傳遞至操作桿1 1的振動， 在受到驅動源單元1 3曲柄軸旋轉產生的振動影響下，可 沿操作桿的軸向中心線P 1在3 6 0 °的範圍內變更方向 。易言之，操作桿1 1的振動方向可沿操作桿的軸向中心 線P 1 ，在3 6 0 °的範圍內依次的變化。 經濟部智慧財產局員工消費合作社印製 現考慮在特定振動方向產生，且由驅動源單位1 3傳 遞的振動之振動頻率，經與該特定振動方向的操作桿固有 振動頻率相符合的情況。然而，如上文述及者，操作桿 1 1的固有振動頻率在沿該桿之軸向中心線P 1的所有角 度位置均爲不同値。因此，即使在該特定振動方向的振動 頻率，經與該特定振動方向的操作桿固有振動頻率相符合 ，該頻率一致性只侷限在操作桿1 1的其中一角度位置； 即共振只發生在操作桿1 1之該一角度位置。此外，該頻 率一致性極迅速的通過該一角度位置。也就是說，即使在 一特定振動方向的振動頻率經與桿的固有振動頻率相符合 ，此頻率一致性只是暫時性或過渡性事件，故操作桿1 1 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -20- 524662 Α7 Β7 五、發明説明（ 的共振可極簡易的被防止。 (請先閱讀背面之注意事項再填寫本頁) 此外，由於操作桿1 1係一體成形的雙管結構，其中 內管部7 2及外管部7 1係藉沿管部7 2及7 1縱方向伸 延，且以不同角度0 1至0 3相互間隔開的脊部7 3至 7 5相互聯接，故操作桿1 1可製成具有簡單剖面輪廓的 單件式構件，而同時其卻可呈現強大的扭力及彎曲剛性。 此外，本實例的操作桿1 1可具有相同的剖面積，故其整 體重量與角度θ 1、β 2、Θ 3係設定爲相互相等的情形 下的整體重量是相同的。 由於本實例的操作桿1 1可製成具有簡單剖面輪廓的 單件式構件，故與習知物件相比，可顯著的減少操作桿的 製造成本及整體重量。 本實例可有效的防止操作桿振動與自驅動源單位1 3 傳遞至操作桿1 1的振動產生共振，而減少操作桿重量及 製造成本，而同時保有操作桿1 1所需機械強度，如扭力 強度、彎曲強度等。 經濟部智慧財產局R工消費合作社印製 由第一脊部7 3及第二脊部7 4形成的角度θ 1最好 是爲大於9 0 ° ，但小於1 2〇° ( 9〇° 〈 0 1 〈 12 0 )。因爲，如果角度0 1設定爲小於120°的大 角度，三個角度0 1、Θ2、及Θ3可相互變得極靠近， 此可在操作桿1 1任何角度位置達成較佳平衡度的幾何慣 性矩I ，且保持相當大數値的幾何慣性矩I 。最佳的角度 Θ1約爲11〇° ，其中02及03可分別爲120°及 13 0° 。因爲，設定爲1 1 0 °的角度θ 1可有利的允許 本紙張尺度適用中國國家標準（CNS ) Α4規格（210Χ297公釐） -21 - 524662 A7 B7 五、發明説明（ 操作桿的幾何慣性矩I接近圖1 0 ( a )所述的極大値。 由於只有角度0 1至Θ 3係變數，而脊部7 3至7 5 的總數量係如上文述及般維持不變，本實例可在不改變操 作桿1 1重量的情形下，保持相當大數値的幾何慣性矩I 。因此，操作桿1 1的固有振動頻率可設定爲相當大的數 値。即，操作桿1 1的固有振動頻率，可簡易的設定成比 由驅動源單位1 3傳遞至操作桿1 1的振動之所有可能的 振動頻率還要高，如此，即可簡易的防止操作桿1 1的共 振。 需指出者，第一、第二、及第三脊部73、74、 7 5的配置順序可爲順時針方向，非一定需爲如圖7所示 的逆時針方向。 (請先閱讀背面之注意事項再填寫本頁)V. Description of the invention (S 1 1 b: End surface of one end of the operating lever 1 1 c: The other end of the operating lever (please read the precautions on the back before filling this page) 1 1 d: Through hole 1 2: Drive shaft 13 : Drive source unit 1 3 a: output shaft of drive source unit 1 3 b: housing of drive source unit 1 4: blade 1 5: handle 1 6: handle holder 1 7: left handle 1 8: right handle 1 9: hanging Belt 2 1: Main shaft part 2 2: Drive-side end shaft part 2 6: Tool-side end shaft part Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 3 0: Clutch mechanism 31: Clutch drum 3 2: Rotating member 3 3: Clutch member 3 4: Hub 3 5: Bearing 3 6: Locking ring 4 0: Clutch case This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -9- 524662 A7 B7 V. Description of the invention () 41 : Operating lever mounting part 4 1 a: Cylindrical body (please read the precautions on the back before filling this page) 4 1 b: Slit 4 1 c: Flange 41d: Through hole 4 2: Coupling part 4 2 a: Cylindrical Shaped wall 4 2 b: Peripheral slit 4 2 c: Through hole 4 3: Drive source mounting portion 4 3 a: Outer cylindrical portion 4 3 b: Inner cylindrical portion 4 3 c: Relaxation fit hole 4 3 d: Contact area 51: Insert nut 5 2: Screw 5 3: Bolt Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economy 61: Gearbox 6 6: Gearbox 6 3: Drive Helical Gear 6 4: Passive Helical Gear 6 5: Passive shaft 6 6: Bearing 6 7: Bearing The paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) -10- 524662 A7 B7 V. Description of the invention (g (Please read the precautions on the back before filling in this Page) 71: Outer tube section 7 2: Inner tube section 7 3, 7 4, 7 5: Ridge 7 6: Detailed description of the bushing invention: Figures 1 and 2 show a lawnmower 1 〇'suitable according to an example of the present invention It is used for cutting trees, such as weeds, shrubs or grasses. The lawn mower 10 has a tubular operating lever 1 1. The driving force transmission shaft or driving shaft 1 is passed through the tubular operating lever 1 1 longitudinally. 2. It is arranged on the operating lever 1 1 A prime mover or drive source unit 1 3 at one end, such as an engine or an electric motor, and a blade 14 provided at the other end of the operating lever 1 1. The drive shaft 12 can be rotated by the drive source unit 1 3, so that the blade 14 can be driven by The source unit 13 is rotated by a driving shaft 12. The lawn mower 10 also has a U-shaped handle 15 and is provided on the operating lever. 1 1 A longitudinal middle part. The handle 15 is fixed to the operating lever 1 1 by a handle holder 16 and has left and right handles 17 and 18. The right handle 18 of the handle 15 serves as an operation portion having a throttle lever and a lock lever to control the drive source unit 13. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs As shown in Fig. 2, the operator M suspends the lawn mower 10 on his shoulder by using a suspender 19 fixed to the middle part of the operating lever 11 with its opposite end. The operator M rotates the blade 14 by the driving source unit 1 3, and swings the blade 14 forward, backward, and left and right by the handles 17 and 18 at the same time, thereby mowing the grass. FIG. 3 is a cross-sectional view of the lawnmower 10 of FIG. 1, showing the clutch mechanism 3 accommodated in the clutch housing 40 and disposed between the drive shaft 12 and an output shaft 1 3 a of the drive source unit 13. 0. That is to say, the drive source unit 13 is adapted to the Chinese National Standard (CNS) A4 specification (210X297 mm) -11-524662 A7 B7 according to the paper size. 5. Description of the invention (Θ clutch housing 40 is mounted to one end of the operating lever 1 1. In the lawnmower 1 〇, the operating lever 11 and the drive shaft 12 are output shafts of the drive source unit 13 (please read the precautions on the back before filling this page) 1 3 a coaxial positioning. Drive shaft 1 2 is "a shaft combining different metals", which is a combination of different kinds of metals. Specifically, the driving shaft 12 has a tubular main shaft portion 21 made of a titanium alloy, and is fixed to the tubular main shaft by, for example, brazing. Section 2 1 —the drive-side end shaft section 2 2 at the end and the tool-side end shaft section 2 6 fixed to the other end of the tubular main shaft section 2 1 by brazing, for example. The drive-side end shaft section 2 2 and the tool-side end shaft section 2 6 Both are made of steel. Titanium alloy 槪 has the same mechanical strength (torsional strength, bending strength, longitudinal elastic modulus, etc.) as steel. Therefore, the main shaft portion 21 made of this titanium alloy can fully maintain cutting Torque and bending rigidity required for lawnmower drive shaft, even for the main shaft part 2 1 Has the same diameter as the conventional counterpart. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs In addition, the specific gravity of steel is about 7.8, and the specific gravity of titanium alloy is about 4.5; The specific gravity is much smaller. Therefore, the titanium alloy main shaft portion 21 used in this example can minimize the sagging vibration caused by the weight of the main shaft portion 21 itself. Therefore, a simple structure can be used to drive When the source unit 13 is activated, the vibration transmitted from the operating lever 11 to the handle 15 through the drive shaft 12 is minimized. Therefore, the operator's load can be significantly reduced. In addition, the steel drive-side end shaft 2 2 and the tool-side end shaft portion 2 6 are integrally connected to the opposite end of the titanium alloy main shaft portion 2 1, so that in the drive shaft 12, the end shaft portions 2 2 and 2 6 are connected to the main shaft portion 2 1 The clutch mechanism 30 is a centrifugal clutch with a keyway and a paper size that applies the Chinese National Standard (CNS) A4 (210X297 mm) -12- 524662 A7 B7 V. Description of the invention ( ) 〇 (Please read the note on the back first Please fill in this page again) Drive shaft 1 2 Drive side end shaft 2 2 Clutch drum 3 connected 1 、 A rotating member 3 2 ′ connected to the output shaft 1 3 a of the drive source unit 1 3 and The rotating member 3 2 is a clutch member 3 3 that meshes the rotating member 32 with the clutch drum 31 at high speed. The clutch drum 31 is a cup-shaped member surrounding the rotating member 32. The clutch housing 40 is made of An integrally molded member made of a resin material, having an operation lever mounting portion 41 connected to one end portion 1 1 a of the operation lever 1 1, and having a specific flexibility and directed by the operation lever mounting portion 41 toward the drive source unit 1 3 The extended flexible coupling portion 4 2 and a driving source mounting portion 43 extending from the flexible coupling portion 4 2 to the driving source unit 13 and connected to the driving source unit 13. The clutch housing 40 is preferably made of a nylon resin with glass fibers mixed therein. The rigidity of the operating lever mounting portion 41 and the driving source mounting portion 43 is greater than that of the flexible coupling portion 42, so that the operating lever 11 and the driving source unit 13 are reliably supported. The flexible coupling portion 42 has less rigidity, so that the driving source unit 13 can be effectively damped. The drive source mounting portion 4 3 is screwed to the case 1 3 b of the drive source unit 1 3. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs because the clutch housing 40 is a one-piece molded one-piece member to provide an operating lever mounting portion 41, a flexible coupling portion 4 2, and a driving source mounting portion 4 3, so it can be reduced. The number of components of the lawn mower, while simplifying the structure of the lawn mower. The blades 1 and 4 are rotatably coupled to the operating lever 1 1 and the other end 1 1 c via a transmission mechanism case 6 1. The transmission mechanism case 61 is provided with a transmission mechanism 62 disposed between the drive shaft 12 and the blade 14 inside. The transmission mechanism 6 2 has a driving helical gear 6 connected to the cutter-side end shaft 2 6 3, a Chinese national standard (CNS) A4 specification (210X297 mm) applicable to this paper size -13- 524662 A7 B7 V. Invention Explanation (^ Drive helical gear 6 3 meshed passive helical gear 6 4 and a driven shaft 6 5 with passive helical gear 6 4 and blade 14 mounted thereon. The drive shafts 1 2 are spaced apart from each other along its longitudinal direction. The open and rotatable support is in most positions. First, one end of the drive shaft 12 is rotatably supported by the drive source mounting portion 43 by a hub 34 and a plurality of bearings 35. That is, the drive of the drive shaft 12 is driven. The side shaft portion 22 is connected to the hub 3 4 of the clutch drum 3 1 by a key groove, and the hub 3 4 is supported by a plurality of bearings 35. Next, the helical gear 6 3 and the majority of the bearings 6 6 are driven by a transmission mechanism housing. 6 1 rotatably supports the other end portion of the drive shaft 1 2. That is, the tool-side end shaft portion 2 6 of the drive shaft 12 is connected to the drive helical gear 6 3, and the drive helical gear 6 3 is a multiple bearing 6 6 Third, the drive shaft 1 is interposed between the drive-side end shaft portion 2 2 and the tool-side end shaft portion 2 6. 2 —The middle part is supported by a plurality of bushes 76 rotatably supported by the operating lever 11; the bushes 7 6 are arranged on the drive shaft 12 and are spaced apart from each other at a uniform interval in the longitudinal direction. Reference numeral 6 7 in Fig. 3 represents a bearing for supporting the driven shaft 65. Figs. 4 to 8 show how the operating lever 11 is coupled to the clutch housing 40. See Fig. 4, the operating lever mounting portion 41 and the flexible coupling portion. 4 2 together form a cylinder, and one end portion 1 1 a of the tubular operating lever 11 is inserted into the cylinder. The drive source mounting portion 43 has a push-out outer cylinder that gradually increases its diameter in the direction of the clutch mechanism 30. The body part 4 3 a and the inner cylinder part integrally formed in a concentric circle relationship with the push-out outer cylindrical part 4 3 a. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) --- ------ Cloth-- (Please read the precautions on the back before filling this page) Order printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-14- 524662 A7 B7 V. Description of the invention ((Please read the first Note for this page, please fill in this page) 4 3 b. The inner cylindrical part 4 3 b has an axial loose fit hole 4 3 c ′ and Deep into the abutment area 4 3 d of the hole 4 3 c. The drive source mounting portion 4 3 also has a bearing 3 5. The slack fitting hole 4 3 c receives the insertion clutch via the lever mounting portion 41 in a loose fit manner. The one end portion 1 1 a of the operating lever 11 in the case 40 allows the one end portion 1 1 a to slide in the axial direction. The dagger 4 3 c tapers toward the abutment area 4 3 d. One end 1 1 a of the operating lever 1 1 may abut its end surface 1 1 b to abut the abutting region 4 3 d in the hole 4 3 c which is deep into the inner cylindrical portion 4 3 b. Reference numeral 3 6 denotes a locking ring 36. The operating lever mounting portion 41 has an axial slit 4 1 b formed in a cylindrical body 4 1 a (FIG. 5). Details of the operation lever mounting portion 41 will be described in FIG. 8. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs As shown in Fig. 5, the flexible coupling portion 42 of the clutch housing 40 has a plurality of rows of peripheral slits 4 2 b spaced apart from each other at a specific axial distance. Each of the peripheral slits 4 2 b is a through-hole communicating with an axial through-hole 4 2 c of the flexible coupling portion 42, and is formed along a circumferential direction of a cylindrical wall 4 2 a of the flexible coupling portion 42. Slender; each peripheral slit 4 2 b extends along only a portion of the circumference of the cylindrical wall 4 2 a. The slits 4 2 b are staggered along the axial direction of the cylindrical wall 4 2 a. Therefore, when the joint portion 42 is cut through a region where two peripheral slits 4 2 b exist transversely, the peripheral slits 4 2 b are along the cylindrical wall 4 in an imaginary section of the joint portion 4 2. The axial centerlines of 2 a are symmetrical to each other. These peripheral slits 4 2 b provide the required flexibility to the flexible joint portion. Figure 6 is a cross-sectional view taken along line 6-6 of Figure 5, showing that the paper size of the driving source is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -15- 524662 A7 _ B7 V. Description of the invention ((please first Read the precautions on the back and fill in this page again.) A peripheral area of the women's clothing section 4 3. In this area, an insert nut 5 1 is embedded to face the inside of the mounting section 4 3, and a screw 5 2 penetrates the insert screw. Cap 5 1. The operating lever 11 includes an inner tube portion 7 2 and an outer tube portion 7 1 with an axial through hole 1 1 d. The nut 5 is inserted through the operating rod 1 1 and the axial through hole 1 1 The screw 5 2 of d can prevent the operating lever 11 from being accidentally disengaged from the drive source mounting portion 4 3. The screw 5 2 can be replaced by other bolts, rivets, etc. with similar functions. 7 is a sectional view of the operating lever taken along line 7-7 in Fig. 4. In the operating lever 11, the inner tube portion 72 passes through the inside of the outer tube portion 71, and the inner tube portion 72 and the outer tube portion 71 are borrowed from three Only the radial ridges 73, 74, 75 are connected to each other. The inner tube portion 7 2, the outer tube portion 71, and the radial ridges 7, 3, 7, 4, 7 5 are integrally formed. That is, the operating lever 11 1 is a double-tube structure configuration, has a circular cross section, and the inner tube portion 7 2 and the outer tube portion 7 1 are mutually connected by radial ridges 7 3, 7 4, 7 5 In the concentric relationship, the three ridges 7 3, 74, and 75 are hereinafter referred to as the first ridge 73, the second ridge 74, and the third ridge 75, respectively. In the operating lever 11, the first ridge 73 and The angle θ 1 formed by the second ridge 74 is set to be greater than 60 ° but less than 120 ° (60 ° <01 <120 °>), and the angle θ 2 formed by the second ridge 74 and the third ridge 75 is set to 12 0 °, and the angle 0 3 formed by the third ridge 75 and the first ridge 7 3 is set as the remaining angle (ie 360 ° — (0 1 + 02) • It should be noted that the angle 0 1 is not equal to the angle < 92, not equal to angle 03. In other words, the three ridges 73, 74, 7 5 are along the axis of the operating rod 1 1 at unequal angular intervals (0 1 Θ 2 and θ 1 Θ 3). Paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) -16- 524662 A7 B7 V. Description of invention (heart configuration. In short, the three ridges 7 3, 7 4, 7 5 are not symmetrical Mode, along the axis of the operating lever 1 1 The center line P 1 is configured. Therefore, the three ridges 7 3, 7 4, 7 5 have a disproportionate cross-sectional profile along the axial center line p 1 in the operating lever 1 1. Fig. 8 is along Fig. 8- An 8-line cross-sectional view of the joystick particularly shows how the joystick 11 is connected to the joystick mounting portion 41. As shown in the figure, the driving shaft 12 passes through the inner tube portion 7 2 of the operating lever 11 and is supported by a bushing 7 6; the bushing 76 is a cylindrical sliding bearing sleeved in the inner tube portion 7 2. . The operation lever mounting portion 41 is formed in a cylindrical body 4a, and has a slit 4b and a pair of flanges 41c facing each other with the slit 41b interposed therebetween. The outer tube portion 7 1 of the operating lever 11 is fitted into an axial through hole 4 1 d of the cylinder 4 1 a, and the opposite flanges 4 1 ^ are held together by a bolt 5 3 so that the outer tube portion 7 One end portion of 1 is frictionally fixed to the inner surface of the lever mounting portion 41. FIG. 9 corresponds to FIG. 4 and shows a state in which the operating lever 11 and the clutch housing 4 are not coupled. As shown in the figure, the axial through-hole 4 1 d of the operation lever mounting portion 41, the axial through-hole 4 2 c of the flexible coupling portion 4 2, and the axial slack fitting hole 4 of the drive source mounting portion 4 3 3 c — form an axially continuous hole together, and taper toward the adjacent area 4 3 d. When one end 1 1 a of the operating lever 11 is inserted in the direction shown by the arrow in FIG. 9 through the axial through hole 4 1 d, and passes through the axial through hole 4 2 c and enters the loose fitting hole 4 3 c, the operating lever The end face 1 Ί b of 1 1 adjoins the adjoining area 4 3 d. This abutting area 4 3 d is a stepped end face, which is formed to drive the size of this paper. Applicable to China National Standard (CNS) A4 specifications (2i0x297). --------- 衣-(Please read first Note on the back, please fill in this page again) Printed on the page by the Consumers ’Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs -17- 524662 A7 B7 V. Description of the invention ((Please read the notes on the back before filling out this page) Source Installation Department 4 3 The loose fitting hole 43 (: penetrates deep into the inside. The end face 1 1 b is a flat surface perpendicular to the axis of the operating lever 11. The axial loose fitting hole 4 3 c is tapered toward the driving source unit 13 and its connection The diameter of the deepest portion of the abutment region 4 3 d is slightly larger than the outer diameter of the outer tube portion 71 of the operating lever 11. In this example, the characteristic function of the clutch housing 40 is to support the drive source unit 13, and The function of reducing the vibration transmitted from the drive source unit 13 to the operating lever 11 is performed independently of each other. That is, the clutch housing 4 ◦ can perform the drive source support function and the vibration isolation function. Specifically, the drive source mounting section 4 3 can be supported in an axial direction, wherein the end face 1 1 b of the operating lever 1 1 is adjacent to the drive The abutment area 4 3 d of the source mounting portion 4 3. Therefore, the driving source unit 13 can be supported by the end surface 1 1 b of the operating lever 11 by the driving source mounting portion 4 3. The driving source mounting portion 4 3 is reliably prevented Unexpected disengagement by the operating lever 11 because it is connected to the operating lever 11 by the flexible coupling portion 4 2 and the operating lever mounting portion 41. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs The diameter of 3 c is suitable for accommodating the operation lever 1 1 at one end portion 1 1 a for axial sliding movement. Therefore, in the outer peripheral surface of the operation lever 11 and the drive source mounting portion 4 3 defining the loose fitting hole 4 3 c A small gap is formed between the wall surfaces. This small gap allows the drive source unit 13 to vibrate to some extent along one end portion 1 a of the operating lever 11; that is, the small gap performs the vibration isolation function. Because the drive source unit 1 3 Since the end surface 1 1 b of the operating lever 11 is supported axially, the flexible coupling portion 4 2 does not need to support the unit 1 3, so that the flexible coupling portion 4 2 can perform its reduction completely independently of the support function of the driving source unit. Vibration function. The size of this paper conforms to China National Standard (CNS) A4 (210X297mm1 " -18-524662 A7 B7 V. Description of the invention ((Please read the precautions on the back before filling this page) With the above configuration, this example can significantly reduce the bad vibration transmitted from the drive source unit 1 3 to the operation lever 11 1 At the same time, the operating lever 11 is allowed to support the driving source unit 13 reliably. Fig. 10 shows the geometric moment of inertia characteristic of the operating lever with respect to the angle 0 1 formed by the first and second ridges. The horizontal axis represents the operating lever The angle θ 1 between the first and second ridges 7 3 and 74 of 1 1, and the vertical axis shows the geometric moment of inertia I of the operating lever 11. The geometric moment of inertia is based on a neutral axis N L in this system. In addition, this figure shows the geometric moment of inertia of the joystick. When the angle Θ 2 between the second and third ridges 74 and 75 is fixed at 120 °, it should be at the first and second ridges. The change caused by the change of the angle β 1 between 7 3 and 7 4. Specifically, part (a) of FIG. 10 shows the geometric moment of inertia I of the operating lever when the angle 0 1 is 120 °. This example assumes that the moment of inertia I of the joystick is "100". Part (b) of FIG. 10 shows the geometric moment of inertia I of the joystick when the angle 0 1 is 60 °. In this example, the geometric moment of inertia I of the joystick is about "95", compared to "100" in part (a). Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. Part (c) of Fig. 10 shows the geometric moment of inertia I of the joystick when the angle θ 1 is 180 °. In this example, the geometric moment of inertia I of the joystick is about “9 5”, as shown in part (b) of FIG. 10. As shown in FIG. 10, the geometric moment of inertia I of the joystick 11 presents a unique curve, which is extremely large under the angular condition shown in part (a) of FIG. 10, and when the angular condition is close to that of FIG. 10 (B) or (c), then gradually decrease its 値. As will be described below, the paper ’s dimensions are subject to the Chinese National Standard (CNS) A4 (210 X 297 mm) in consideration of this geometric inertia. -19- 524662 A7 ____B7_ V. Description of the invention (VII (please read the precautions on the back first) (Fill in this page) Under the moment characteristic, why are the three ridges 7 3, 7 4, 7 5 arranged along the axial centerline P 1 of the operating rod i 1 at unequal angular intervals or in a non-symmetric relationship with each other. Since the ridges 7 3 to 7 5 are not symmetrical in the profile of the operating lever 11, the geometric moment of inertia I of the operating lever 11 is different at all angular positions along the axial centerline P 1. Therefore, The natural vibration frequency of the operating lever is also different at all angular positions along the axial center line p 1. In addition, the vibration transmitted from the driving source unit 13 to the operating lever 11 is subject to the crank of the driving source unit 13 Under the influence of the vibration of the shaft rotation, the direction can be changed within the range of 360 ° along the axial center line P 1 of the operating lever. In other words, the vibration direction of the operating lever 11 can be along the axial center line of the operating lever. P 1 changes sequentially in the range of 360 °. Economy Printed by the Intellectual Property Bureau employee consumer cooperative is now considering the vibration frequency generated in a specific vibration direction and transmitted by the drive source unit 13 to match the natural vibration frequency of the joystick in the specific vibration direction. However, as above As mentioned in the text, the natural vibration frequency of the operating rod 11 is different at all angular positions along the axial centerline P 1 of the rod. Therefore, even if the vibration frequency in the specific vibration direction passes through the specific vibration, The natural vibration frequency of the operating lever in the direction matches, and the frequency consistency is limited to only one angular position of the operating lever 11; that is, resonance occurs only at the angular position of the operating lever 11. In addition, the frequency consistency is extremely rapid. Through the angle position. That is, even if the vibration frequency in a specific vibration direction matches the natural frequency of the rod, this frequency consistency is only a temporary or transient event, so the operating lever 1 1 paper size Applicable to China National Standard (CNS) A4 specification (210X297mm) -20- 524662 Α7 Β7 V. Description of the invention (Please read the precautions on the back before filling out this page) In addition, since the operating rod 11 is a one-piece double-tube structure, the inner tube portion 72 and the outer tube portion 71 are borrowed along the tube portion 72 and 7 1 extends in the longitudinal direction and is spaced from each other at different angles 0 1 to 0 3. The ridges 7 3 to 7 5 are connected to each other. Therefore, the operation lever 11 can be made into a single-piece member with a simple cross-sectional profile, while at the same time its However, it can show strong torsion and bending rigidity. In addition, the operating lever 11 of this example can have the same cross-sectional area, so its overall weight and angles θ 1, β 2, Θ 3 are set to be equal to each other when they are equal to each other. The weight is the same. Since the operating lever 11 of this example can be made into a single-piece member having a simple cross-sectional profile, the manufacturing cost and the overall weight of the operating lever can be significantly reduced compared with conventional objects. This example can effectively prevent the vibration of the operating lever from resonating with the vibration transmitted from the driving source unit 1 3 to the operating lever 11, thereby reducing the weight and manufacturing cost of the operating lever, while maintaining the mechanical strength required for the operating lever 11 such as torque Strength, flexural strength, etc. The angle θ 1 formed by the first ridge portion 73 and the second ridge portion 74 printed by the R & D consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs is preferably greater than 90 °, but less than 120 ° (90 ° < 0 1 <12 0). Because if the angle 0 1 is set to a large angle less than 120 °, the three angles 0 1, Θ2, and Θ3 can become very close to each other, which can achieve a better balance of geometric inertia at any angular position of the joystick 11 Moment I and maintain the geometric moment of inertia I of considerable magnitude 値. The best angle Θ1 is about 110 °, of which 02 and 03 can be 120 ° and 130 ° respectively. Because the angle θ 1 set to 1 10 ° can advantageously allow this paper size to apply the Chinese National Standard (CNS) A4 specification (210 × 297 mm) -21-524662 A7 B7 V. Description of the invention (the geometric moment of inertia of the operating lever I is close to the maximum 値 described in Figure 10 (a). Since only the angles 0 1 to Θ 3 are variables, and the total number of ridges 7 3 to 7 5 is maintained as described above, this example can be used in Without changing the weight of the joystick 11, the geometric moment of inertia I of a relatively large number 保持 is maintained. Therefore, the natural vibration frequency of the joystick 11 can be set to a relatively large number 値. That is, the natural vibration of the joystick 11 1 The frequency can be easily set to be higher than all possible vibration frequencies of the vibration transmitted from the drive source unit 13 to the operating lever 11, so that the resonance of the operating lever 11 can be simply prevented. The arrangement order of the first, second, and third ridges 73, 74, and 75 can be clockwise, and it does not necessarily have to be counterclockwise as shown in Figure 7. (Please read the precautions on the back before filling (This page)
、1T 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) Α4規格（210X297公釐） -22-、 1T Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs This paper size applies to China National Standard (CNS) Α4 specifications (210X297 mm) -22-